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The Encyclopedia of Horology

Wristwatch · Chronograph with moon phase

Omega Speedmaster Moonphase Ref. 304.30.44.52.01.001

Partially verified

This stainless steel Omega Speedmaster Moonphase wristwatch, reference 304.30.44.52.01.001, is housed in a 44mm brushed and polished tonneau-form case with a screw-down exhibition back. The source reports that it is powered by a 54-jewel automatic Calibre 9904 movement featuring a co-axial escapement and column-wheel chronograph. Its black dial features luminous baton hour markers, twin subsidiary dials at 3 and 9 for combined seconds, date, and 12-hour recording, and a moon phase aperture above 6 o'clock. Fitted with an Omega link bracelet and signed folding clasp, the watch was accompanied at auction by its box, warranty and chronometer cards, original purchase receipt, and documentation.

Front view of the Omega Speedmaster Moonphase stainless steel chronograph wristwatch
Front view of the Omega Speedmaster Moonphase stainless steel chronograph wristwatch — Bonhams. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
www.bonhams.com
Category
Wristwatch · Chronograph with moon phase
Maker / attribution
Omega
Reference
304.30.44.52.01.001
Catalogue / lot identifier
153
Source-reported date
Purchased 15th September 2017
Country
Switzerland
Source-reported serial
89169828

Source-reported attribution and specifications are not independent authentication. A listing does not establish present ownership, current display, availability or permission to reproduce.

Object description

Construction and Case Design

This stainless steel Speedmaster Moonphase is housed in a 44mm tonneau-form case with a brushed and polished finish. The case features a screw-down exhibition back and is fitted with a signed fluted winding crown flanked by two chronograph pushers.

The watch is mounted on a brushed and polished link bracelet secured by a signed folding clasp.

Evidence for this section
  • “Size: 44mm”
  • “Case: Brushed and polished tonneau form, screw down exhibition back, crown flanked by twin chronograph pushers”
  • “Strap/Bracelet: Brushed and polished Omega link”

Dial and Complications

The black dial features luminous baton hour markers, white outer 1/5th second divisions, and polished pointed baton hands with luminous inserts. A centre chronograph hand is included.

The dial configuration includes subsidiary dials at the 3 and 9 o'clock positions for seconds combined with date and 12-hour recording, and a moon phase aperture located above the 6 o'clock position.

Evidence for this section
  • “Black, luminous baton hour markers, white outer 1/5th second divisions, subsidiary dials at 3 and 9 for seconds combined with date and 12 hour recording, moon phase aperture above 6”
  • “polished pointed baton hands with luminous inserts”
  • “centre chronograph hand”

Movement and Specifications

According to the provided record, the watch is powered by a 54-jewel Cal.9904 automatic movement, which incorporates a co-axial escapement and a column wheel chronograph mechanism.

The movement is identified by serial number 89169828.

Evidence for this section
  • “Movement: 54-jewel Cal.9904 automatic, co-axial escapement, column wheel chronograph, No.89169828”

Accompaniments

The lot was auctioned with the following documentation and accessories: an Omega box, outer card, International Warranty, Master Chronometer Certificate, Pictograms Card, and original purchase receipt.

The set also includes parts replaced during a prior service, specifically the crown and pushers.

Evidence for this section
  • “Accompaniments: Omega box, outer card, International Warranty, Master Chronometer Certificate, Pictograms Card, original purchase receipt, parts replaced during service including crown and pushers”

Open research questions

  • What is the specific nature of the service history that necessitated the replacement of the crown and pushers?
  • Do the included Pictograms card and warranty details provide a specific manufacturing year for this serial number?

Source evidence

Recorded claims and source quotations for Omega Speedmaster Moonphase Ref. 304.30.44.52.01.001
FieldSource-reported valueSource quotation
ModelSpeedmaster Moonphase“Model: Speedmaster Moonphase”
Reference304.30.44.52.01.001“Reference: 304.30.44.52.01.001”
Movement54-jewel Cal. 9904 automatic“54-jewel Cal.9904 automatic, co-axial escapement, column wheel chronograph, No.89169828”
DialBlack with moon phase and subsidiary dials“Black, luminous baton hour markers, white outer 1/5th second divisions, subsidiary dials at 3 and 9 for seconds combined with date and 12 hour recording, moon phase aperture above 6”
Case Size44mm“Size: 44mm”
Original Purchase Date15th September 2017“Date: Purchased 15th September 2017”
Serial Number89169828“No.89169828”

Visible details

  • Black tachymeter bezel surrounding a black dial
  • Sub-dials at 3 and 9 o'clock featuring white numerals and track markings
  • Detailed photographic moon graphic inside the aperture above 6 o'clock
  • Dual chronograph pushers flanking a signed fluted winding crown
  • Brushed and polished stainless steel link bracelet

Research qualifications

  • Movement condition and exhibition case back are concealed in the primary frontal photograph.
  • Internal calibre specifications and individual serial numbers rely on auction cataloguer statements.

Photograph identity and source facts were screened before import; rights clearance remains pending.

Consulted source

Bonhams : Omega. A stainless steel automatic calendar chronograph bracelet watch with moon phase and Co-Axial Escapement Speedmaster Moonphase , Ref: 304.30.44.52.01.001, Purchased 15th September 2017

Reviewed 2026-10-22 · Record c2ad09d77c

Terms in this record

Glossary explanations for terms named in this object’s record.